/Engine/Source/Runtime/CoreUObject/Public/UObject/PackageTrailer.h
Allow EPayloadAccessMode to work with string builder
namespace UE { template<typename CharType> [TStringBuilderBase](API\Runtime\Core\Containers\TStringBuilderBase)< CharType > & UE::operator<< ( [TStringBuilderBase](API\Runtime\Core\Containers\TStringBuilderBase)< CharType > & Builder, [EPayloadAccessMode](API\Runtime\CoreUObject\UObject\UE__EPayloadAccessMode) Mode ) }